The beta-globin gene from a thalassemic patient was cloned and sequenced.  The technician who characterized this gene informs you that a point mutation was found, but that it can not account for the thalassemia because the mutation occurred within an intron sequence.  What doesn’t the technician understand?

Which of the following best describes a frameshift mutation?

Tetracycline is an antibiotic that binds to the 30S subunit of the bacterial ribosome.  This information suggests that the most likely mechanism by which tetracycline blocks bacterial growth is to inhibit synthesis of:

Which is not true regarding enzymes lowering the activation energy of a reaction?

Which is the only amino acid that does not have a resonance isomer (i.e. enantiomer with L and D forms)?

Which of the following statements describes purines and pyrimidines in DNA molecules?

Using what you have learned about the pH scale’s properties: If [H+] = 1 x 10^-5 M, what’s the [OH-]?

What two reactions are catalyzed by aminoacyl tRNA synthetases?

According to Cell Theory, all cells come from other cells.

The genetic code contains the following number of codons: